Lateral motion spring damping car truck



Sept. 10, 1935. w WEBB 2,013,797

LATERAL MOTION SPRING DAMPING CAR TRUCK Filed Feb. 13,1932 2 Sheets-Sheet 1 Sept. 10, 1935. E w WEBB 2,013,797

LATERAL MOTION SPRING DAMPING "AR TRUCK Filed Feb. 13, 1932 2 Sheets-Sheet 2 V A f 1 r V/III nvnior ala/W 71 W 77/7Z9AZZor y of the truck and relative Fig. 2 is a horizontal Patented Sept. 10, 1935 UNITED STATES PATENT OFFICE Edwin W. Webb, Chica go, 111., assignor to Standard Car Truck Company, Chicago, 11]., a corporation of New Jersey Application February 13, 1932,.Serial No. 592,720

1 Claim.

This invention relates to what may be termed lateral motion, spring damping car trucks.

It is the object of this invention to provide novel means for yieldingly supporting the ends 5 of a truck bolster of a car truck on springs carried by the side frames, to increasingly check or damp the movement of the springs as they are compressed, while at the same time permitting the truck bolster to have lateral motion transversely to the-side frames at all times.

To this end, generally stated, the invention consists in the novel parts and novel combinations of parts hereinafter defined in the claim and described in the following specification, made in connection with the accompanying drawings, wherein like reference characters refer to the same or similar parts throughout the various views, and, in which,

Fig. 1 is a view in side elevation illustrating portions of a car truck wherein the present invention is embodied, some of the parts being broken away and shown in vertical section to more clearly illustrate the construction thereof;

section taken substantially on the line 22 of Fig. 1,-as indicated by the arrows; and

Fig. 3 is a view taken chiefly in vertical section substantially. on the line 3-3 of Fig. 1, as indi- 3 cated by the arrows.

35 disposed. Portions Referring to the drawings, there are illustrated certain portions of a car truck which include a side frame 4 having a bolster opening 5 within which one end of a car truck bolster'G is of the side frame 4 form bolstercolumns 1. One end of aspring plank 8 disposed withinthe bolster opening 5 rests on the side frame 4 and a group of coiled bolster springs 9 are supported at their lower ends on this end of the spring plank 8.

In accordance with the invention, wear plates in of channel-shape in horizontal cross section are applied to the bolster columns I, so that the columns are received within the channels thereof. These wear plates It] may be removably secured to the columns as by means of nutted bolts H and lugs l2 formed on the side frame 4 and overlying the side surfaces of the wear plates. The inner surfaces of the columns 1 are preferably recessed, as best shown in Fig. 1, to receive the intermediate webs of the channel-shaped wear plates l0 and thus prevent vertical movement of the wear plates when they are applied in position. Wedge members l3 are provided and each wedge member has a horizontal bottom side frame 4'. Transversely of the side supported by the wedge members l3 and, in turn,

surface which rests on the upper ends of the springs 9 at one side of the transverse vertical central plane of the truck. These wedge members have outer vertical surfaces of channelshape in horizontal cross section which bear 6 against the wear plates Ill. The wear plates are, of course, received within the outer channels of the wedge members and it will be seen that the wedge members l3 have freedom for limited vertical sliding movement relative tothe wear plates land the bolster columns I. From adjacent the inner or central edges of the wedge members l3, the members incline upwardly and outwardly away from the central vertical transverse plane of the truck, to form inclined surfaces l3a having ball recesses |3b formed therein. These ball recesses I 3b are spaced from each other transversely of the. wedge members l3 and, as best shown in Fig: 1, the recesses are of arcuate shape in vertical section taken longitudinally of the 20 I frame and the wedge members lit, the ball recesses I31; are of semi-elliptic shape in vertical cross section, as best shown in Fig. 3.

Steel balls l4 fit within the various ball recesses l3b to be supported upon and contact the recessed portions of the inclined surfaces of the wedge members l3. The various balls I4 disposed within the recesses |3b of each wedge member are guided and spaced from each other by spacing guides l5.

The end of the bolster 6 is beveled at its lower edges to form inclined surfaces 6a facing and paralleling the inclined surfaces l3a of the wedge members l3. Ball recesses 6b corresponding in contour to the recesses I 31) are formed in the. surfaces 6a to oppose the. recesses l3b. The balls l4 fit within the recesses 6b and, accordingly, the end of the bolster 6 rests on the balls" I4 40 supported by the springs 9. It will be understood that the truck bolster 6 will be supported at both ends in the manner illustrated.

When the car truck is in service, as the wheels of the truck rimover a high spot on the rails, the bolster springs 9 will be compressed thereby causing the end of the bolster 6 supported by the side frame 4 to lower somewhat relative to the side frame to-move the balls l4 and the wedge members downwardly slightly relative to the bolster columns 1. The balls l4 will tend to move to lower levels in the ball recesses l3b. In other words, the balls M will tend to move inwardly or toward the central transverse vertical plane of the car truck, thereby exerting pressure on the wedge members l3 to move them outwardly into all times, the truck bolster 6 and the load placed thereon by the body bolster (not illustrated) of the car, can have a limited lateral travel crosswise of the truck and transversely of the side frames 4. This lateral travel of the bolster is possible by reason of the use of the balls l4 upon which the ends of the truck bolster are supported. When the car is traveling around curves of the track, the truck bolster may move somewhat laterallyQshereby greatly lessening the wear and tear on the wheel flanges and the rails and otherwise easing up, to a considerable extent, the handling of the load. The spacing guides l5 within which the balls l4 are mounted, cause. all the balls bearing against a particular wedge member I3 to take corresponding positions in the various recesses lib and ib within which the balls flt.

It will, of course, be understood that various changes may be made in the form, details, ar-

rangement and proportions of the various parts 5 without departure from \the scope of the present invention.

What is claimed is:-

In a car truck, side frames having bolster columns, bolster springs supported at their lower ends by said side frames, wedge members resting on the upper ends of said springs, and having friction surfaces engaging said columns, said wedge members having recessed surfaces of arcuate-shape in vertical longitudinal cross section and of semi-elliptical-shape in vertical transverse section, the chords of the arcs formed by said recessed surfaces in vertical longitudinalsection lying in planes tipped diagonally upwardly and toward the friction surfaces of said wedge members, balls disposed within said recesses and a truck bolster having surfaces adjacent its ends directly opposed to the recessed surfaces of said wedge members, the opposed surfaces of said bolster resting on said balls.

EDWIN w. WEBB. 

